Gregg Thomas Pottorff, M.D.
Sports Medicine (Orthopaedic Surgery) Physician · Castro Valley, CA
Gregg Thomas Pottorff, M.D. is a sports medicine (orthopaedic surgery) physician with a practice address in Castro Valley, California, and NPI 1477520096, issued on Mar 2, 2006. Check the license (California G61064, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregg Thomas Pottorff
- Credential
- M.D.
- Primary taxonomy
- Sports Medicine (Orthopaedic Surgery) Physician 207XX0005X
- License number
- G61064 CA
Self-reported in NPPES; status is on the state search - Practice location
- 19842 Lake Chabot RD, Castro Valley, CA 94546
- Phone
- (510) 886-8844
- Enumerated
- Mar 2, 2006
- Record last updated
- Jun 7, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (510) 247-8280
- Medicare enrollment
- Enrolled (PECOS I20240924001832); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest sports medicine (orthopaedic surgery) physician records → All 384 in California → Look up another NPI →
Also registered at 19842 Lake Chabot RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Robert Forster, M.D.Orthopaedic Surgery Physician1003883356
- Virginia Lieu, MDOrthopaedic Trauma Physician1063945962
- Victoria Pao, M.D.Plastic Surgery Physician1295726768
- Steven Zourabian, D.O.Orthopaedic Trauma Physician1578918926
Verify Gregg Thomas Pottorff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G61064Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average sports medicine (orthopaedic surgery) physician in 2024
73 Medicare Part D claims for 12 beneficiaries, against an average of 288 among the 2,562 providers of this specialty who prescribed in Part D.
Most prescribed
- Celecoxib15 claims
- Atorvastatin Calcium11 claims
- Montelukast Sodium11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $25.95
1 payment: food and beverage; the largest payer was Exact Sciences Corporation. The 2,400 providers of this specialty with any payment received $19,779.31 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Hill Health Inc A Medical CorporationOakland, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregg Thomas Pottorff among 384 sports medicine (orthopaedic surgery) physician records in California
Gregg Thomas Pottorff, M.D. is one of 384 sports medicine (orthopaedic surgery) physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 57% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated1986 · median 2003 among the 293 with a school on file
- Record last updated2012 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XX0005X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Sports Medicine (Orthopaedic Surgery) Physician providers in California
There are 384 sports medicine (orthopaedic surgery) physician records in California.
All 384 in California → Every provider in Castro Valley → Sports Medicine (Orthopaedic Surgery) Physician nationwide →
The 8 sports medicine (orthopaedic surgery) physician records with the nearest ZIP codes
- Benjamin Halligan, MDFremont, CA 945381972715985
- Kerisimasi Reynolds, D.O.Fremont, CA 945381518282920
- Stephen Franzino, MDFremont, CA 945361114037033
- Russell Nord, M.D.Fremont, CA 945361245436542
- Brian Freeto, M.D.Napa, CA 945581962573576
- Stephen Viess, MDDublin, CA 945681770510117
- Semon Bader, M.D.Concord, CA 945201750581278
- Joseph Cheng, M.D.San Leandro, CA 945781871696997
Common questions
What is Gregg Thomas Pottorff, M.D.'s NPI number?
Gregg Thomas Pottorff, M.D.'s National Provider Identifier (NPI) is 1477520096, issued on Mar 2, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregg Thomas Pottorff, M.D. located?
The NPPES record lists a practice address at 19842 Lake Chabot RD, Castro Valley, CA, 94546. Phone: (510) 886-8844. Providers update this record themselves, so call before visiting.
How can I verify Gregg Thomas Pottorff, M.D.'s license?
NPPES lists California license number G61064, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gregg Thomas Pottorff, M.D. prescribe under Medicare Part D?
In 2024, Gregg Thomas Pottorff, M.D. had 73 Medicare Part D claims for 12 beneficiaries; the average among sports medicine (orthopaedic surgery) physician prescribers was 288. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.